The best way to describe KerNO is 'DoorsOS for NOSTUB programs' KerNO provides: Anti-Crash protection (Address Error, Illegal Instruction, etc...), ESC-ON to break out of programs that are not responding, DIAMOND-ON to turn the calculator off even when it is 'busy', Removes the ASM program size limits, ASM programs can return values in expressions. This release also speeds up the keyboard repeat rates. Supported Calculators: TI-89, TI-92p, and V200.